It seems more to me that you're using objfpc or delphi mode so you get ansistrings?

Hello,

1.

var s:string;
...
s[1]:='#';   -->   causes an access violation

2.

Why is it no more possible to assign the length index s[0] in a string? I find that is too much security to supress that.
It is cutting responsibility from the programmers.

Kind regards,
Rainer

You are using ansistrings instead of shortstrings. Use SetLength() first to allocate memory.

Peter

Unlikely. string meant for years ansistring in objfpc/delphi mode.

is it now changing generally to ansistrings? How can I assign "normal" pascalstrings?

shortstring

Does that mean that

var s:string; is definig an ansistring in delphi mode?

In the previous version this works, is it now changing generally to ansistrings?
How can I assign "normal" pascalstrings?
Is there a description about the behaviour of strings and ansistrings in the various modes?

Kind regards,
Rainer

string[12] ?

Yes.

In the previous version this works, is it now changing generally to ansistrings?

Yes.
In old versions {$mode delphi} did not automatically imply {$h+}. Now it does.

How can I assign "normal" pascalstrings?

Put

{$h-}

at the start of your file, or use the -Sh- option on the command-line.

Alternatively, define your string as
Var
  S : Shortstring;

This works in any mode, and is delphi compatible.

Is there a description about the behaviour of strings and ansistrings in the various modes?

Yes, the reference documentation. The only effect of the {$h} directive is to map String->Ansistring when {$h ON} or String-> Shortstring when {$h off} is in effect. You can always force either of those by explicitly using ansistring, shortstring or declaring a fixed-length string.

This is 100% delphi compatible. The only thing that has changed is that {$mode delphi} now implicitly implies {$h+}. This is again compatible with newer versions of Delphi, where {$H+} is now the default.

Hope this clarifies matters a bit. I'll add a statement of the changed behaviour to the documentation of {$mode} and {$H}

Michael.

Obviously, since the definition of shortstring is:

  ShortString = String[255];

So actually your above statement is equivalent to writing

 Var s:string[255][12];

which, you'll agree, is wrong :-)

Michael.

Florian Klaempfl wrote

> How can I assign "normal" pascalstrings? shortstring

what does

var s:string[12];

in delphimode mean?
ansistring or shortstring?
if ansistring, how can I get access to a "normal" pascal (short)string with maximum length of 12?

var s:shortstring[12];

does not work in delphi mode.

Rainer

ok, now I understand.

string means ansistring in delphi mode
and string[12] means shortstring with maximum length of 12 in delphi mode.

Thanks,
Kind regards
Rainer

OK, this part I understand, now, thanks for explanation. I'm not deep involved in compiler programming, but it is good to know that string[255] also works.

Now, I use the www.frameworkpascal.com for a DOS Program and ported it to Linux, so that the program can run with DOS and Linux. Let it run in DOS with fpc compiler seems more work, so I run the program in DOS with the frameworkcompiler.

I did it now with additional compiler args -Sh- and it works, thanks.

Kind regards,
Rainer